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Abstract：
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The stress analysis of mold in the whole punching-forging process of small aluminum alloy head was conducted by software Deform-3D, and the influence of tolerance value on the mold stress analysis was discussed. Then, the influences of punch pressing speed, friction coefficient and die fillet radius on the stress of punch and die were discussed respectively, and the optimum process parameters that are favorable to the mold and can reduce the defects of head were determined by the mold stress analysis. The results show that the tolerance value seriously affectes the mold stress analysis. When the tolerance values ≥2, the stress along various directions of mold is basically consistent with the corresponding directions of billet, and the die fillet radius has the greatest influence on the mold stress, the friction coefficient is the second, and the punch pressing speed is the least. At the same time, the optimal punching-forging process parameters of aluminum alloy head are determined as the die fillet radius of 11 mm, the punch pressing speed of 120 mm·s-1 and the friction coefficient of 0.02.
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Funds：
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国家自然科学基金资助项目（51574147，51790481）；辽宁省自然科学基金资助项目（201602474）
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AuthorIntro：
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王旺兵（1993-），男，硕士研究生，E-mail：2279539707@qq.com；通讯作者：王旭（1979-），男，博士，副教授，E-mail：wangxu@lnpu.edu.cn
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Reference：
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